WO2018072044A1 - Roller for a conveyor belt - Google Patents
Roller for a conveyor belt Download PDFInfo
- Publication number
- WO2018072044A1 WO2018072044A1 PCT/CL2017/000022 CL2017000022W WO2018072044A1 WO 2018072044 A1 WO2018072044 A1 WO 2018072044A1 CL 2017000022 W CL2017000022 W CL 2017000022W WO 2018072044 A1 WO2018072044 A1 WO 2018072044A1
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- WO
- WIPO (PCT)
- Prior art keywords
- roller
- cylindrical body
- diameter
- conveyor belt
- pollin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G15/00—Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G23/00—Driving gear for endless conveyors; Belt- or chain-tensioning arrangements
- B65G23/02—Belt- or chain-engaging elements
- B65G23/04—Drums, rollers, or wheels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G39/00—Rollers, e.g. drive rollers, or arrangements thereof incorporated in roller-ways or other types of mechanical conveyors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G39/00—Rollers, e.g. drive rollers, or arrangements thereof incorporated in roller-ways or other types of mechanical conveyors
- B65G39/10—Arrangements of rollers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G39/00—Rollers, e.g. drive rollers, or arrangements thereof incorporated in roller-ways or other types of mechanical conveyors
- B65G39/10—Arrangements of rollers
- B65G39/12—Arrangements of rollers mounted on framework
- B65G39/16—Arrangements of rollers mounted on framework for aligning belts or chains
Definitions
- the present invention is framed within the field of conveyor belts, it refers to a roller or pollin that has a shape that facilitates centering for conveyor belts when they have been offset from their longitudinal trajectory.
- the invention in particular relates to a pollin or roller for a conveyor belt that has a configuration and shape that allows accelerating the centering process of the conveyor belt.
- Conveyor belts are used in a variety of industries to transport material from one place to another.
- the materials to be transported are deposited on the belt, which is mounted on a series of roller stations that support it and allow it to be guided from one end to the other.
- the process of loading the conveyor belt although it is true that it follows a series of steps aimed at uniformly loading the load on the conveyor belt, in order to maintain a distribution of the load as homogeneous as possible across the length and width of the conveyor belt, however there is always an irregularity of load on the conveyor belt, where also as the belt advances the load is also accommodating, causing it not to have a completely even distribution on the belt causing the loads and distribution of weights on this is uneven, which causes the belt to travel along the roller stations, usually from the central point of the roller stations to the sides.
- trajectory which normally involves damage to the edges of the conveyor belts, as well as the wear of the surfaces of the rollers unevenly, or on the mobile components of the roller stations or polines, which are subjected to uneven loads due to the off-center of the belt, as well as of the individual pins, and of the centering means or devices comprising the stations of rollers or polines, product of the decompensated load that is produced on said components, when viewed subjected to an additional load due to the decentralization of the conveyor belt.
- centering pins or belt alignment pins of a conveyor belt load transport system which allow avoiding , to a certain extent, the de-centering of the belt from its trajectory, or centering it during its trajectory so as to prevent the edges of the straps from being damaged and material deterioration.
- the normal configuration of a typical alignment pin or belt center whether they are load, reversible, single return, double return, as well as all the polines of a transport system, can be configured in such a way that they comprise elements that allow a relative movement of the pollen so that the belt returns to its centered position, either when it is loaded or. empty.
- roller station on which the belt transported with transverse and longitudinal pivot elements is supported and driven, so that said roller stations can be adjusted to some extent to the lateral movement of the belt, and can keep it centered, to some extent, to avoid loss of load such as lateral damage to the edges of the conveyor belt, or keep the belt as centered as possible to avoid a difference in effort in the roller structure that supports and guides the belt through its longitudinal path.
- the elements that allow said relative movement of the pollen to keep the conveyor belt centered, when moving from its center, in the current technique they are configured by a support shaft, an external roller that can rotate, supported on the shaft, in addition to a pivot assembly that can be configured as a pivot means located within the roller or pollen, defining a pivot axis on which The roller is pivotable in relation to the axis, the pivot axis having a perpendicular position with respect to the belt, when it is in operation, it runs on the pollen, where when the belt moves from the pollen, the edge of the belt contacts some means that allows the pollen drum to pivot on its pivot axis, guiding the belt back to its centered position.
- the loading and return stations comprising a structure for the support and guidance of a conveyor belt, normally comprise three rollers, arranged adjacently next to each other, that is to say in a normal configuration a return station comprises a central roller and two lateral rollers, and a loading station comprises a central roller and two lateral rollers, arranged in an angular location relative to the central roller.
- said return and load stations comprise a pivot system associated with the support structure of the roller assembly comprising each of the stations, so that said pivot system allows the conveyor belt to offset from its longitudinal path the edges of the belt contact the surfaces of the side rollers causing the pivot system to move as a result of the torsional forces, allowing the belt to line up again centered, however the movement of said pivot does not allow efficiently, it is say quickly return to its centered trajectory the conveyor belt, since the configuration of said lateral rollers always maintains a relative movement and speed that is the same throughout the entire structure of the station, thus keeping the belt movement constant, making the edges of the conveyor belt ad more exposed years.
- the primary object of the invention corresponds to providing a roller or pollin to be used in a roller station of a conveyor belt load transport system, whose configuration and shape allows to help keep as centered as possible and with minimal damage to the belt and the components of the roller station with a centering system of which it will be part.
- Still another object of the invention is to provide a roller or pollin for use in different roller stations used in a conveyor belt load transport system, whose configuration and shape allows to help keep a conveyor belt centered, without maintaining a prolonged off-center time
- Another object of the invention is to provide a roller or pollin for use in a conveyor belt load transport system whose shape and configuration allows accelerating the centering process of a conveyor belt that is produced by the action of a roller station, and avoid damaging the side edges of the conveyor belt when it is offset from its trajectory.
- the invention relates to a roller or pollin for use in a roller station, which is used in a conveyor belt load transport system, whose configuration and shape allow accelerating the centering of the conveyor belt when it is offset from its longitudinal path.
- a roller or pollin for use in a roller station, which is used in a conveyor belt load transport system, whose configuration and shape allow accelerating the centering of the conveyor belt when it is offset from its longitudinal path.
- which comprises a hollow cylindrical body that has a length or length that follows a longitudinal axis x, and has a first end and a second end, where the first end has a first diameter corresponding to the total outer diameter of said first end of the body cylindrical and has a second diameter corresponding to the total outer diameter of said second end of the cylindrical body, where the first diameter of the first end is smaller than the second diameter of the second end, where the relationship between the diameters of the ends of the cylindrical body varies between a range of at least 1: 1, 1 to at least 1: 1, 4.
- Figure 1 corresponds to a top side perspective view of a loading roller station where the roller or pollen of the present invention is used.
- Figure 2.- corresponds to a top side perspective view of a return roller station where the roller or pollen of the present invention is used.
- Figure 3 corresponds to a side view in longitudinal section of the roller of the present invention.
- Figure 4.- corresponds to a side view in longitudinal section of the roller of the present invention, in a first embodiment.
- Figure 5.- corresponds to a side view in longitudinal section of the roller of the present invention, in a second embodiment.
- the invention corresponds to a roller for use in roller stations for a conveyor belt, such as loading stations, as illustrated in Figure No. 1, for use in a return roller station, as illustrated in Figure No. ° 2, as well as in other applications of a transport system of load by conveyor belts, where the roller is configured through a hollow cylindrical body (1), which comprises a first end (2) and a second end ( 3).
- the cylindrical body (1) has a length (a) that extends along a longitudinal axis x, along which also extends a central opening (4) which has the same length (a) that the cylindrical body possesses, thus forming the hollow cylindrical body (1).
- the first end (2) has a first diameter (c) corresponding to the total outer diameter of said first end (2) of the cylindrical body and has a second diameter (b) corresponding to the total outer diameter of said second end (3) of the cylindrical body, where the first diameter (c) of the first end (2) is smaller than the second diameter (b) of the second end (3).
- the cylindrical body is configured by a hollow cylindrical main body (1 ' ) having a central opening (4 ' ) extending along the entire body from the first end (2 ' ) to the second end (3 ' ), it has an end diameter (d) of the hollow cylindrical body (1 ' ) that is constant along its longitudinal axis x, that is, from the first end (2 ' ) to the second end (3'), where on the outer surface (5) of the hollow main body ( ' ) an outer lining (6) is provided that forms an outer liner of the hollow cylindrical body (1 ') having a first diameter (c) at the first end of the cylindrical body that is smaller than a second diameter (b) at the second end (3 ' ) of the cylindrical body, where the relationship between the outer diameters of the lining in its ends, which is provided on the outer surface or of the cylindrical body, there must be a ratio of end diameters that varies in a range of at least 1: 1, 1 to at least 1: 1, 4, and where
- the hollow cylindrical body (1, 1 ' ) of the roller can comprise on its inner surface (7), at least one of its ends (2, 3) means to be able to fix in the middle of the seal and / or a cover, and / or a bearing, and / or at least one means for rotating a shaft.
- the roller of the invention is configured as a hollow cylindrical main body (1) by a hollow pipe having a first end (2) and a second end ( 3), where said pipe has a length (a) that extends along the longitudinal axis x, and where said hollow pipe has an inner surface (7) and an outer surface (5) defining a constant diameter (d) along the length of the x-axis of the hollow cylindrical body (1).
- a coating or lining (8) having a first diameter (c) at the first end (2) that is smaller than a second diameter (b) is arranged or formed.
- the configuration and shape of the coating is determined so that the relationship between the diameters of the ends of the cylindrical body lining is found in a range between at least 1: 1, 1 to at least 1: 1.4, or where the ratio between the outer diameter (d) of the cylindrical body and the smaller diameter (c) of the first end of the outer liner of the cylindrical body is found in a ratio that vary in the range of at least 1: 1, 1 to at least 1: 1, 3, and where the ratio between the outer diameter (d) of the cylindrical body and the largest diameter (b) of the second outer lining end of the cylindrical body is tra in a ratio that varies in the range of at least 1: 1, 3 to at least 1: 1, 5.
- the coating or coating (8) of the hollow cylindrical body (1) is formed, for example, by a layer of rubber, or other elastomeric material, where in such a configuration said coating may comprise a section with diamond-shaped drawings (9), defining a central portion (10) of the coating, leaving a strip free of drawings (11) from each of the ends (2, 3) to a predefined length towards the center of the pollin or roller.
- the shape of the roller according to the present invention is used, for example, in a centering roller structure or station of a conveyor belt, such as that illustrated in Figures 1 and 2, which allows the amount of movement of the equipment to be used, which is constant for the entire roller in a given period of time, so that at the time that a belt runout occurs from its longitudinal path, the edge of the belt touches the roller liner of the present invention, which will cause the ends of the belt to suffer variations in their contact with respect to a variable diameter of the pollen or roller of the present invention, causing the tangential speed of the latter to vary at the contact points, producing a torsional force, generating that the roller station rotate on a central pivot of the roller station, directed the belt towards the central point, where the amount of movement is May r, that is, moving it back towards the center, so as to maintain its longitudinal trajectory again.
- the shape of the roller of the present invention determined by the relationship between diameters, allows the pollin or roller of the present invention, being part of a roller station, to accelerate the centering process of the conveyor belt to its path condition longitudinal or centered, thus avoiding exposing the edges of the off-center belt to damage for a prolonged time, where in addition the force of the off-center belt is greater on the equipment which causes the equipment to malfunction with its consequent damage.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rollers For Roller Conveyors For Transfer (AREA)
Abstract
Description
RODILLO PARA CORREA TRANSPORTADORA ROLLER FOR CONVEYOR BELT
La presente invención se enmarca dentro del campo de las correas transportadoras, se refiere a un rodillo o polín que posee una forma que permite facilitar el centrado para correas transportadoras cuando se han descentrado desde su trayectoria longitudinal. La invención en forma particular se refiere a un polín o rodillo para una correa transportadora que posee una configuración y forma que permiten acelerar el proceso de centrado de la correa transportadora. The present invention is framed within the field of conveyor belts, it refers to a roller or pollin that has a shape that facilitates centering for conveyor belts when they have been offset from their longitudinal trajectory. The invention in particular relates to a pollin or roller for a conveyor belt that has a configuration and shape that allows accelerating the centering process of the conveyor belt.
ANTECEDENTES DE LA INVENCION BACKGROUND OF THE INVENTION
Las correas transportadoras son utilizadas en una variedad de industrias para transportar material desde un lugar a otro. Generalmente los materiales a ser transportados son depositados sobre la correa, la cual va montada sobre una serie de estaciones de rodillos que la soportan y permiten guiarla de un extremo a otro. El proceso de carga de la correa transportadora, si bien es cierto que sigue una serie de etapas orientadas a cargar en forma uniforme la carga sobre la correa transportadora, de forma de mantener una distribución de la carga lo más homogénea posible a lo largo y ancho de la correa transportadora, sin embargo siempre existe una irregularidad de carga sobre la correa transportadora, donde además a medida que la correa avanza la carga además se va acomodando, haciendo que no posea una distribución completamente pareja sobre la correa haciendo que las cargas y distribución de pesos sobre esta sea dispareja, lo cual produce que la correa en su recorrido sobre las estaciones de rodillos, normalmente se descentre desde el punto central de las estaciones de rodillos hacia los costados. Conveyor belts are used in a variety of industries to transport material from one place to another. Generally the materials to be transported are deposited on the belt, which is mounted on a series of roller stations that support it and allow it to be guided from one end to the other. The process of loading the conveyor belt, although it is true that it follows a series of steps aimed at uniformly loading the load on the conveyor belt, in order to maintain a distribution of the load as homogeneous as possible across the length and width of the conveyor belt, however there is always an irregularity of load on the conveyor belt, where also as the belt advances the load is also accommodating, causing it not to have a completely even distribution on the belt causing the loads and distribution of weights on this is uneven, which causes the belt to travel along the roller stations, usually from the central point of the roller stations to the sides.
En la técnica, actualmente son bien conocidos los sistemas, medios o dispositivos que permiten en alguna medida mantener centrada la correa transportadora a lo largo de su trayectoria, sin embargo siempre poseen un movimiento lateral desplazándose desde su centro hacia el costado a lo largo de su trayectoria, lo cual implica normalmente en el daño de los bordes de las correas transportadoras, así como en el desgaste de las superficie de los rodillos en forma dispareja, o bien sobre los componentes móviles de las estaciones de rodillo o polines, que se ven sometidos a cargas disparejas producto del descentrado de la correa, así como de los polines en forma individual, y de los medios o dispositivos de centrado que comprenden las estaciones de rodillos o polines, producto de la carga descompensada que se produce sobre dichos componentes, al verse sometida a una carga adicional por el descentramiento de la correa transportadora. In the art, the systems, means or devices that allow to keep the conveyor belt centered along its trajectory are well known today, however they always have a lateral movement moving from their center to the side along their length. trajectory, which normally involves damage to the edges of the conveyor belts, as well as the wear of the surfaces of the rollers unevenly, or on the mobile components of the roller stations or polines, which are subjected to uneven loads due to the off-center of the belt, as well as of the individual pins, and of the centering means or devices comprising the stations of rollers or polines, product of the decompensated load that is produced on said components, when viewed subjected to an additional load due to the decentralization of the conveyor belt.
i Por lo tanto siempre existe una necesidad en lá técnica del transporte de carga por correas transportadoras el proporcionar sistemas, dispositivos o elementos en la estructura de soporte y guiado de una correa transportadora que permitan ayudar a mantener dicha correa lo más centrada posible durante su funcionamiento y traslado desde un extremo a otro, ya sea con carga o descargada, de forma de evitar la diferencia de esfuerzos a los cuales se puedan ver sometidos los componentes de la estructura de soporte y rodadura de dichas correas transportadoras, de forma de aumentar la vida útil de dichos componentes, así como disminuir las detenciones, reparaciones y/o mantenciones. i Therefore, there is always a need in the art of transporting cargo by conveyor belts to provide systems, devices or elements in the support and guidance structure of a conveyor belt that help to keep said belt as centered as possible during its operation and transfer from one end to another, whether loaded or unloaded, in order to avoid the difference in efforts to which the components of the support and rolling structure of said conveyor belts can be subjected, in order to increase the useful life of said components, as well as reducing arrests, repairs and / or maintenance.
En la actualidad una de la soluciones al problema, de descentrado de las correas transportadora a lo largo de su trayectoria, es la utilización de polines centradores o polines de alineamiento de correa de un sistema de transporte de carga por correa transportadora, los cuales permiten evitar, en cierta medida, el descentramiento de la correa desde su trayectoria, o bien centrarla durante su trayectoria de forma evitar que los bordes de las correas se vean dañados y se produzca el deterioro del material. La configuración normal de un típico polín de alineación o centrador de correa, ya sean polines de carga, de carga reversible, de retorno simple, de retomo doble, así como todos los polines de un sistema de transporte, pueden estar configurados de forma tal que comprenden elementos que permiten un movimiento relativo del polín para que vuelva la correa a su posición centrada, ya sea cuando se encuentra cargada o. vacía. Currently, one of the solutions to the problem, of off-centering of the conveyor belts along its trajectory, is the use of centering pins or belt alignment pins of a conveyor belt load transport system, which allow avoiding , to a certain extent, the de-centering of the belt from its trajectory, or centering it during its trajectory so as to prevent the edges of the straps from being damaged and material deterioration. The normal configuration of a typical alignment pin or belt center, whether they are load, reversible, single return, double return, as well as all the polines of a transport system, can be configured in such a way that they comprise elements that allow a relative movement of the pollen so that the belt returns to its centered position, either when it is loaded or. empty.
Otras de las soluciones normalmente utilizadas en la técnica es la configuración de una estación de rodillos, sobre la cual es soportada y conducida la correa transportada con elementos de pivote transversal y longitudinal, de forma que dichas estaciones de rodillos se puedan ajustar en cierta medida al movimiento lateral de la correa, y puedan mantenerla centrada, en alguna medida, para evitar así la perdida de carga como el daño lateral de los bordes de la correa transportadora, o bien mantener la correa lo más centrada posible para evitar una diferencia de esfuerzos en la estructura de rodillo que soporta y guía la correa a través de su trayectoria longitudinal. Other of the solutions normally used in the art is the configuration of a roller station, on which the belt transported with transverse and longitudinal pivot elements is supported and driven, so that said roller stations can be adjusted to some extent to the lateral movement of the belt, and can keep it centered, to some extent, to avoid loss of load such as lateral damage to the edges of the conveyor belt, or keep the belt as centered as possible to avoid a difference in effort in the roller structure that supports and guides the belt through its longitudinal path.
Sin bien es cierto que los esfuerzos en la técnica han ayudado a mantener en cierta forma la correa transportadora centrada a lo largo de su trayectoria, de forma de mantener lo más parejo posible los esfuerzos de carga sobre los elementos de soporte y guiado de dicha correa transportadora, sin embargo no han sido suficientes para dar solución al problema de descentramiento de la correa transportadora. However, it is true that efforts in the art have helped to keep the conveyor belt centered along its trajectory in a certain way, in order to keep the load stress on the support and guidance elements of said belt as even as possible. However, they have not been sufficient to solve the problem of decentralization of the conveyor belt.
Los elementos que permiten dicho movimiento relativo del polín para lograr mantener centrada la correa transportadora, cuando se desplaza desde su centro, en la técnica actual se encuentran configurados por un eje de soporte, un rodillo exterior que puede girar, soportado en el eje, además de un conjunto de pivote que puede estar configurado como un medio de pivote ubicado dentro del rodillo o polín, definiendo un eje de pivote sobre el cual el rodillo es pivotable en relación al eje, teniendo el eje de pivote una posición perpendicular con respecto de la correa, cuando se encuentra en operación, corre sobre el polín, donde cuando la correa se desplaza desde el polín, el borde de la correa contacta algún medio que permite que el tambor del polín pivote sobre su eje de pivote, guiando a su posición centrada nuevamente la correa. The elements that allow said relative movement of the pollen to keep the conveyor belt centered, when moving from its center, in the current technique they are configured by a support shaft, an external roller that can rotate, supported on the shaft, in addition to a pivot assembly that can be configured as a pivot means located within the roller or pollen, defining a pivot axis on which The roller is pivotable in relation to the axis, the pivot axis having a perpendicular position with respect to the belt, when it is in operation, it runs on the pollen, where when the belt moves from the pollen, the edge of the belt contacts some means that allows the pollen drum to pivot on its pivot axis, guiding the belt back to its centered position.
Las estaciones de carga y retorno que comprende una estructura para el soporte y guiado de una correa transportadora, normalmente comprenden tres rodillos, dispuestos en forma adyacente uno al lado de otro, es decir en una configuración normal una estación de retorno comprende un rodillo central y dos rodillos laterales, y una estación de carga comprende un rodillo central y dos rodillos laterales, dispuesto en una ubicación angular respecto del rodillo central. Generalmente dichas estaciones de retorno y carga comprenden un sistema de pivote asociado a la estructura de soporte del conjunto de rodillo que comprenda cada una de las estaciones, de forma que dicho sistema de pivote permite que al descentrarse la correa transportadora desde su trayectoria longitudinal los bordes de la correa contacten las superficies de los rodillos laterales haciendo que el sistema de pivote se mueva producto de las fuerzas de torsión, permitiendo que la correa se alinee en forma centrada nuevamente, sin embargo el movimiento de dicho pivote no permite en forma eficiente, es decir rápidamente volver a su trayectoria centrada la correa transportadora, ya que la configuración de dichos rodillos laterales siempre mantiene un movimiento y velocidad relativa que es igual a través de toda la estructura de la estación, manteniéndose constante así el movimiento de la correa, haciendo que se mantenga de forma más expuesta los bordes de la correa transportadora a daños. The loading and return stations comprising a structure for the support and guidance of a conveyor belt, normally comprise three rollers, arranged adjacently next to each other, that is to say in a normal configuration a return station comprises a central roller and two lateral rollers, and a loading station comprises a central roller and two lateral rollers, arranged in an angular location relative to the central roller. Generally, said return and load stations comprise a pivot system associated with the support structure of the roller assembly comprising each of the stations, so that said pivot system allows the conveyor belt to offset from its longitudinal path the edges of the belt contact the surfaces of the side rollers causing the pivot system to move as a result of the torsional forces, allowing the belt to line up again centered, however the movement of said pivot does not allow efficiently, it is say quickly return to its centered trajectory the conveyor belt, since the configuration of said lateral rollers always maintains a relative movement and speed that is the same throughout the entire structure of the station, thus keeping the belt movement constant, making the edges of the conveyor belt ad more exposed years.
Por lo tanto existe la necesidad en la técnica de poder contar con un medio que en conjunto con los sistema de centrado utilizados en la técnica permita mantener los más centrada posible la correa transportadora a lo largo de su trayectoria, de forma que la disposición de dicho medio en las estaciones de rodillos permita disminuir, mitigar o evitar el daño en los borde laterales de la correas transportadora, así como distribuir en cierta medida las diferencia de esfuerzo por carga sobre el conjunto de estructura de rodillos, para poder acelerar el proceso de centrado de la correa transportadora, evitando que permanezca un tiempo prolongado descentrada, para lograr así aumentar la vida útil de la correa transportadora como de los componentes individuales que comprende una estación de rodillo que posee medios que permiten en alguna medida mantener lo más centrada posible una correa transportadora. RESUMEN OE LA INVENCIÓN Therefore, there is a need in the art to be able to have a means that together with the centering system used in the technique allows the conveyor belt to be kept as centered as possible along its trajectory, so that the arrangement of said medium in the roller stations allows to reduce, mitigate or avoid damage to the side edges of the conveyor belts, as well as to distribute to some extent the difference in load stress on the roller structure assembly, in order to accelerate the centering process of the conveyor belt, preventing it from remaining a prolonged off-center time, in order to increase the life of the conveyor belt as well as the individual components comprising a roller station that has means that allow to some extent keep a belt as centered as possible. conveyor SUMMARY OE THE INVENTION
El objeto primario de la invención corresponde a proporcionar un rodillo o polín para ser utilizado en una estación de rodillos de un sistema de transporte de carga por correa transportadora, cuya configuración y forma permita ayudar a mantener lo más centrada posible y con el mínimo daño a la correa y a los componentes de la estación de rodillo con un sistema de centrado del cual será parte. The primary object of the invention corresponds to providing a roller or pollin to be used in a roller station of a conveyor belt load transport system, whose configuration and shape allows to help keep as centered as possible and with minimal damage to the belt and the components of the roller station with a centering system of which it will be part.
Aun otro objetivo de la invención es proporcionar un rodillo o polín para ser utilizado en diferentes estaciones de rodillos utilizados en un sistema de transporte de carga por correa transportadora, cuya configuración y forma permita ayudar a mantener centrada una correa transportadora, sin que se mantenga un tiempo prolongado descentrada. Still another object of the invention is to provide a roller or pollin for use in different roller stations used in a conveyor belt load transport system, whose configuration and shape allows to help keep a conveyor belt centered, without maintaining a prolonged off-center time
Otro objetivo de la invención es proporcionar un rodillo o polín para ser utilizado en un sistema de transporte de carga por correa transportadora cuya forma y configuración permita acelerar el proceso de centrado de una correa transportadora que se produce por la acción de una estación de rodillos, y evitar el daño de los bordes laterales de la correa transportadora cuando se descentra desde su trayectoria. Another object of the invention is to provide a roller or pollin for use in a conveyor belt load transport system whose shape and configuration allows accelerating the centering process of a conveyor belt that is produced by the action of a roller station, and avoid damaging the side edges of the conveyor belt when it is offset from its trajectory.
La invención se refiere a rodillo o polín para ser utilizado en una estación de rodillos, que es utilizado en un sistema de transporte de carga por correa transportadora, cuya configuración y forma permiten acelerar el centrado de la correa transportadora cuando se descentre desde su trayectoria longitudinal, que comprende un cuerpo cilindrico hueco que posee una longitud o largo que siguen un eje longitudinal x, y posee un primer extremo y un segundo extremo, donde el primer extremo posee un primer diámetro que corresponde al diámetro total exterior de dicho primer extremo del cuerpo cilindrico y posee un segundo diámetro que corresponde al diámetro total exterior de dicho segundo extremo del cuerpo cilindrico, donde el primer diámetro del primer extremo es menor que el segundo diámetro del segundo extremo, donde la relación entre los diámetros de los extremos del cuerpo cilindrico varía entre un rango de al menos 1 :1 ,1 a al menos 1 :1 ,4. The invention relates to a roller or pollin for use in a roller station, which is used in a conveyor belt load transport system, whose configuration and shape allow accelerating the centering of the conveyor belt when it is offset from its longitudinal path. , which comprises a hollow cylindrical body that has a length or length that follows a longitudinal axis x, and has a first end and a second end, where the first end has a first diameter corresponding to the total outer diameter of said first end of the body cylindrical and has a second diameter corresponding to the total outer diameter of said second end of the cylindrical body, where the first diameter of the first end is smaller than the second diameter of the second end, where the relationship between the diameters of the ends of the cylindrical body varies between a range of at least 1: 1, 1 to at least 1: 1, 4.
DESCRIPCION DETALLADA DE LA INVENCION DETAILED DESCRIPTION OF THE INVENTION
Diversas modalidades no limitantes de la presente invención se describirán ahora para proporcionar una comprensión general de los principios de función estructural, fabricación y uso de los aparatos, métodos y artículos descritos en la presente descripción. Uno o más ejemplos de estas modalidades no limitantes se ilustran en las figuras adjuntas. Los expertos en la materia entenderían que los aparatos y métodos específicamente descritos en la presente descripción e ilustrados en las figuras adjuntas son modalidades ilustrativas no limitantes y que el alcance de las diversas modalidades no limitantes de la presente invención se define, únicamente, por las reivindicaciones. Las características ilustradas o descritas en conjunto con una modalidad no limitante pueden combinarse con las características de otras modalidades no limitantes. Dichas modificaciones y variaciones tienen el propósito de estar incluidas en el alcance de la presente invención. Various non-limiting embodiments of the present invention will now be described to provide a general understanding of the principles of structural function, manufacture and use of the apparatus, methods and articles described in the present description. One or more examples of these non-limiting modalities are illustrated in the attached figures. Those skilled in the art would understand that the apparatus and methods specifically described herein. Description and illustrated in the attached figures are illustrative non-limiting modalities and that the scope of the various non-limiting modalities of the present invention is defined solely by the claims. The features illustrated or described in conjunction with a non-limiting modality can be combined with the characteristics of other non-limiting modalities. Such modifications and variations are intended to be included within the scope of the present invention.
DESCRIPCIÓN DE LOS DIBUJOS DESCRIPTION OF THE DRAWINGS
Con objeto de ayudar a una mejor comprensión de las características del invento, de acuerdo con un ejemplo preferente de la realización práctica del mismo, se acompaña como parte integrante de la descripción, un juego de dibujos en donde con carácter ilustrativo y no limitativo, se ha representado la invención. In order to help a better understanding of the features of the invention, according to a preferred example of the practical embodiment thereof, a set of drawings is attached as an integral part of the description where, for illustrative and non-limiting purposes, has represented the invention.
La figura 1.- corresponde a una vista en perspectiva superior lateral de una estación de rodillo de carga en donde es utilizado el rodillo o polín de la presente invención. Figure 1 .- corresponds to a top side perspective view of a loading roller station where the roller or pollen of the present invention is used.
La figura 2.- corresponde a una vista en perspectiva superior lateral de una estación de rodillo de retorno en donde es utilizado el rodillo o polín de la presente invención. Figure 2.- corresponds to a top side perspective view of a return roller station where the roller or pollen of the present invention is used.
La figura 3.- corresponde a una vista lateral en corte longitudinal del rodillo de la presente invención. Figure 3 .- corresponds to a side view in longitudinal section of the roller of the present invention.
La figura 4.- corresponde a una vista lateral en corte longitudinal del rodillo de la presente invención, en una primera modalidad. Figure 4.- corresponds to a side view in longitudinal section of the roller of the present invention, in a first embodiment.
La figura 5.- corresponde a una vista lateral en corte longitudinal del rodillo de la presente invención, en una segunda modalidad. Figure 5.- corresponds to a side view in longitudinal section of the roller of the present invention, in a second embodiment.
REALIZACIÓN PREFERENTE DE LA INVENCION PREFERRED EMBODIMENT OF THE INVENTION
La invención corresponde a un rodillo para ser utilizado en estaciones de rodillo para una correa transportadora, tal como estaciones de carga, como ilustrada en la figura N° 1 , para la utilización en una estación de rodillo de retorno, como ilustrada en la figura N° 2, así como también en otras aplicaciones de un sistema de transporte de carga por correas transportadoras, donde el rodillo se encuentra configurado a través de un cuerpo cilindrico hueco (1 ).que comprende un primer extremo (2) y un segundo extremo (3). Haciendo referencia a la figura N° 3 y 5 el cuerpo cilindrico (1) posee un largo (a) que se extiende a lo largo de un eje longitudinal x, a lo largo del cual también se extiende una abertura central (4) que posee el mismo largo (a) que posee el cuerpo cilindrico, formando así el cuerpo cilindrico hueco (1 ). El primer extremo (2) posee un primer diámetro (c) que corresponde al diámetro total exterior de dicho primer extremo (2) del cuerpo cilindrico y posee un segundo diámetro (b) que corresponde al diámetro total exterior de dicho segundo extremo (3) del cuerpo cilindrico, donde el primer diámetro (c) del primer extremo (2) es menor que el segundo diámetro (b) del segundo extremo (3). The invention corresponds to a roller for use in roller stations for a conveyor belt, such as loading stations, as illustrated in Figure No. 1, for use in a return roller station, as illustrated in Figure No. ° 2, as well as in other applications of a transport system of load by conveyor belts, where the roller is configured through a hollow cylindrical body (1), which comprises a first end (2) and a second end ( 3). Referring to Figure 3 and 5, the cylindrical body (1) has a length (a) that extends along a longitudinal axis x, along which also extends a central opening (4) which has the same length (a) that the cylindrical body possesses, thus forming the hollow cylindrical body (1). The first end (2) has a first diameter (c) corresponding to the total outer diameter of said first end (2) of the cylindrical body and has a second diameter (b) corresponding to the total outer diameter of said second end (3) of the cylindrical body, where the first diameter (c) of the first end (2) is smaller than the second diameter (b) of the second end (3).
Se ha logrado determinar que la relación entre los diámetros de los extremos del cuerpo cilindrico (1 ) del rodillo de la presente invención, así como la relación que existe entre el diámetro de los rodillos que forman parte de una estación de rodillos, es fundamental en la forma de funcionamiento que puede otorgar la forma que se logra obtener de dicha relación de diámetros en el funcionamiento de dicha una estación de rodillos, en la cual es utilizado el rodillo de la presente invención, es así que se ha determinado que la relación entre los diámetros de los extremos del cuerpo cilindrico se encuentre en una relación que varíe en el rango de entre al menos 1 :1 ,1 a al menos 1 :1 ,4, y donde la relación entre los diámetros de los rodillos que forman parte de la estación sea tal que el diámetro medio entre el diámetro máximo (b) y mínimo (c) de los extremos del rodillo o polín de la presente invención sea equivalente al diámetro del polín o rodillo central (RC) de la estación de rodillos, que es de un diámetro constante, tal como es ilustrado en las figuras N° 1 y 2. It has been determined that the relationship between the diameters of the ends of the cylindrical body (1) of the roller of the present invention, as well as the relationship between the diameter of the rollers that are part of a roller station, is fundamental in the form of operation that can be given the form that can be obtained from said relationship of diameters in the operation of said a roller station, in which the roller of the present invention is used, is thus determined that the relationship between the diameters of the ends of the cylindrical body are in a ratio that varies in the range of at least 1: 1, 1 to at least 1: 1, 4, and where the ratio between the diameters of the rollers that are part of the station is such that the average diameter between the maximum (b) and minimum (c) diameter of the ends of the roller or pollen of the present invention is equivalent to the diameter of the central pollin or roller ( RC) of the roller station, which is of a constant diameter, as illustrated in Figures 1 and 2.
En una forma de realización de la invención, tal como se ilustra a través de la figura N° 4, el cuerpo cilindrico se encuentra configurado por un cuerpo principal cilindrico hueco (1 ') que posee una abertura central (4') que se extiende a lo largo de todo el cuerpo desde el primer extremo (2') al segundo extremo (3'), posee un diámetro extremo (d) del cuerpo cilindrico hueco (1 ') que es constante a lo largo de su eje longitudinal x, es decir desde el primer extremo (2') al segundo extremo (3'), donde sobre la superficie exterior (5) del cuerpo principal hueco ( ') se proporciona un revestimiento (6) exterior que conforman un revestimiento exterior del cuerpo cilindrico hueco (1 ') que posee un primer diámetro (c) en el primer extremo del cuerpo cilindrico que es menor a un segundo diámetro (b) en el segundo extremo (3') del cuerpo cilindrico, donde relación entre los diámetros exterior del revestimiento en sus extremos, que se proporciona en la superficie exterior del cuerpo cilindrico, deben estar una relación de diámetros de extremos que varía en un rango de entre al menos 1 :1 ,1 a al menos 1 :1 ,4, y donde la relación entre el diámetro exterior (d) del cuerpo cilindrico con el diámetro menor (c) del primer extremo del revestimiento exterior del cuerpo cilindrico se encuentra en una relación que varían en el rango de entre al menos 1 :1 ,1 a al menos 1 :1 ,3, y donde la relación entre el diámetro exterior (d) del cuerpo cilindrico con el diámetro mayor (b) del segundo extremo del revestimiento exterior del cuerpo cilindrico se encuentra en una relación que varía en el rango de entre al menos 1 :1 ,3 a al menos 1 :1 ,5, y donde la relación entre los diámetros de los rodillos que forman parte de la estación, sea tal que el diámetro medio entre el diámetro máximo (b) y mínimo (c) de los extremos del rodillo o polín de la presente invención sea equivalente al diámetro del polín o rodillo central (RC) de la estación de rodillos, que es de un diámetro constante, tal como es ilustrado en las figuras N° 1 y 2. In an embodiment of the invention, as illustrated by Figure 4, the cylindrical body is configured by a hollow cylindrical main body (1 ' ) having a central opening (4 ' ) extending along the entire body from the first end (2 ' ) to the second end (3 ' ), it has an end diameter (d) of the hollow cylindrical body (1 ' ) that is constant along its longitudinal axis x, that is, from the first end (2 ' ) to the second end (3'), where on the outer surface (5) of the hollow main body ( ' ) an outer lining (6) is provided that forms an outer liner of the hollow cylindrical body (1 ') having a first diameter (c) at the first end of the cylindrical body that is smaller than a second diameter (b) at the second end (3 ' ) of the cylindrical body, where the relationship between the outer diameters of the lining in its ends, which is provided on the outer surface or of the cylindrical body, there must be a ratio of end diameters that varies in a range of at least 1: 1, 1 to at least 1: 1, 4, and where the ratio between the outer diameter (d) of the cylindrical body with the smaller diameter (c) of the first end of the outer lining of the cylindrical body is in a ratio that vary in the range of at least 1: 1, 1 to at least 1: 1, 3, and where the ratio between outer diameter (d) of the cylindrical body with the largest diameter (b) of the second end of the The outer lining of the cylindrical body is in a ratio that varies in the range of at least 1: 1, 3 to at least 1: 1, 5, and where the ratio between the diameters of the rollers that are part of the station, is such that the average diameter between the maximum (b) and minimum (c) diameter of the ends of the roller or pollen of the present invention is equivalent to the diameter of the central roller (RC) of the roller station, which is of a constant diameter, as illustrated in Figures 1 and 2.
El cuerpo cilindrico hueco (1 ,1 ') del rodillo, puede comprender en su superficie interior (7), en al menos uno de sus extremos (2, 3) medios para poder fijar en medio de sello y/o una tapa, y/o un rodamiento, y/o al menos un medio para fijar en forma giratoria un eje. The hollow cylindrical body (1, 1 ' ) of the roller, can comprise on its inner surface (7), at least one of its ends (2, 3) means to be able to fix in the middle of the seal and / or a cover, and / or a bearing, and / or at least one means for rotating a shaft.
En un ejemplo de aplicación tal que se ilustra en la figura N° 5, el rodillo de la invención se encuentra configurado como un cuerpo principal cilindrico hueco (1 ) por una cañería hueca que posee un primer extremo (2) y un segundo extremo (3), donde dicha cañería posee una longitud (a) que se extiende a lo largo del eje longitudinal x, y donde dicha cañería hueca posee una superficie interior (7) y una superficie exterior (5) que define un diámetro (d) constante a lo largo de la longitud del eje x del cuerpo cilindrico hueco (1). Sobre la superficie exterior (5) del cuerpo cilindrico hueco (1 ), es dispuesto o formado un recubrimiento o revestimiento (8) que posee un primer diámetro (c) en el primer extremo (2) que es menor a un segundo diámetro (b) formado en el segundo extremo (3) del cuerpo cilindrico hueco (1), de forma tal que la configuración y forma del recubrimiento, se encuentra determinado de forma que la relación entre los diámetros de los extremos del recubrimiento del cuerpo cilindrico se encuentran en un rango entre al menos 1:1, 1 á al menos 1:1,4, o donde la relación entre el diámetro exterior (d) del cuerpo cilindrico con el diámetro menor (c) del primer extremo del revestimiento exterior del cuerpo cilindrico se encuentra en una relación que varían en el rango de entre al menos 1 :1 ,1 a al menos 1 :1 ,3, y donde la relación entre el diámetro exterior (d) del cuerpo cilindrico con el diámetro mayor (b) del segundo extremo del revestimiento exterior del cuerpo cilindrico se encuentra en una relación que varía en el rango de entre al menos 1 :1 ,3 a al menos 1 :1 ,5. In an example of application such as illustrated in Figure No. 5, the roller of the invention is configured as a hollow cylindrical main body (1) by a hollow pipe having a first end (2) and a second end ( 3), where said pipe has a length (a) that extends along the longitudinal axis x, and where said hollow pipe has an inner surface (7) and an outer surface (5) defining a constant diameter (d) along the length of the x-axis of the hollow cylindrical body (1). On the outer surface (5) of the hollow cylindrical body (1), a coating or lining (8) having a first diameter (c) at the first end (2) that is smaller than a second diameter (b) is arranged or formed. ) formed at the second end (3) of the hollow cylindrical body (1), such that the configuration and shape of the coating is determined so that the relationship between the diameters of the ends of the cylindrical body lining is found in a range between at least 1: 1, 1 to at least 1: 1.4, or where the ratio between the outer diameter (d) of the cylindrical body and the smaller diameter (c) of the first end of the outer liner of the cylindrical body is found in a ratio that vary in the range of at least 1: 1, 1 to at least 1: 1, 3, and where the ratio between the outer diameter (d) of the cylindrical body and the largest diameter (b) of the second outer lining end of the cylindrical body is tra in a ratio that varies in the range of at least 1: 1, 3 to at least 1: 1, 5.
El revestimiento o recubrimiento (8) del cuerpo cilindrico hueco (1 ) se encuentra conformado por ejemplo por una capa de caucho, u otro material elastómero, donde en una configuración dicho recubrimiento puede comprender una sección con dibujos en forma de rombos (9), que definen una porción central (10) del recubrimiento, dejando una franja libre de dibujos (11 ) desde cada uno de los extremos (2, 3) hasta una longitud predefinida hacia el centro del polín o rodillo. La forma del rodillo de acuerdo a la presente invención es utilizado por ejemplo en una estructura o estación de rodillos centradores de una correa transportadora, tal como la ilustrada en las figuras N° 1 y 2, que permite utilizar la cantidad de movimiento del equipo, la cual es constante para todo el rodillo en un periodo de tiempo dado, de forma que al momento que se produzca un descentramiento de la correa desde su trayectoria longitudinal, el borde de la correa toque el revestimiento del rodillo de la presente invención, lo cual originara que los extremos de la correa sufran variaciones en su contacto con respeto a un diámetro variable del polín o rodillo de la presente invención, haciendo que la velocidad tangencial de éste varíe en los puntos de contacto, produciendo una fuerza de torsión, generando que la estación de rodillo gire sobre un pivote central de la estación de rodillos, direccionado la correa hacia el punto central, donde la cantidad de movimiento es mayor, es decir moviéndola de retorno hacia el centro, de forma de mantener nuevamente su trayectoria longitudinal. La forma del rodillo de la presente invención, determinada por la relación entre diámetros, permite que el polín o rodillo de la presente invención, siendo parte de una estación de rodillo, permita acelerar el proceso de centrado de la correa transportadora a su condición de trayectoria longitudinal o centrada, evitando exponer así por un tiempo prolongado los bordes de la correa descentrada a daño, donde además la fuerza de la correa descentrada es mayor sobre el equipo lo cual produce un mal funcionamiento del equipo con su consecuente daño. The coating or coating (8) of the hollow cylindrical body (1) is formed, for example, by a layer of rubber, or other elastomeric material, where in such a configuration said coating may comprise a section with diamond-shaped drawings (9), defining a central portion (10) of the coating, leaving a strip free of drawings (11) from each of the ends (2, 3) to a predefined length towards the center of the pollin or roller. The shape of the roller according to the present invention is used, for example, in a centering roller structure or station of a conveyor belt, such as that illustrated in Figures 1 and 2, which allows the amount of movement of the equipment to be used, which is constant for the entire roller in a given period of time, so that at the time that a belt runout occurs from its longitudinal path, the edge of the belt touches the roller liner of the present invention, which will cause the ends of the belt to suffer variations in their contact with respect to a variable diameter of the pollen or roller of the present invention, causing the tangential speed of the latter to vary at the contact points, producing a torsional force, generating that the roller station rotate on a central pivot of the roller station, directed the belt towards the central point, where the amount of movement is May r, that is, moving it back towards the center, so as to maintain its longitudinal trajectory again. The shape of the roller of the present invention, determined by the relationship between diameters, allows the pollin or roller of the present invention, being part of a roller station, to accelerate the centering process of the conveyor belt to its path condition longitudinal or centered, thus avoiding exposing the edges of the off-center belt to damage for a prolonged time, where in addition the force of the off-center belt is greater on the equipment which causes the equipment to malfunction with its consequent damage.
Si bien la forma del polín o rodillo aquí descrito constituyen una inclusión preferida de esta invención, se debe entender que la invención no se limita a esta forma precisa de polín o rodillo, y que se pueden hacer cambios en éste sin apartarse del alcance de la invención, que se definen en las reivindicaciones adjuntas. While the shape of the pollin or roller described herein constitutes a preferred inclusion of this invention, it should be understood that the invention is not limited to this precise form of pollin or roller, and that changes can be made therein without departing from the scope of the invention, which are defined in the appended claims.
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CL2016002642 | 2016-10-17 | ||
| CL2642-2016 | 2016-10-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2018072044A1 true WO2018072044A1 (en) | 2018-04-26 |
Family
ID=62018178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CL2017/000022 Ceased WO2018072044A1 (en) | 2016-10-17 | 2017-08-02 | Roller for a conveyor belt |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2018072044A1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4502310A (en) * | 1979-07-09 | 1985-03-05 | Gosudarstvenny Proektny I Konstruktorsky Institut Sojuzprommekhanizatsia | Conveyor roller and method of manufacture thereof |
| EP0930252A1 (en) * | 1998-01-15 | 1999-07-21 | MANNESMANN Aktiengesellschaft | Conveyor for articles |
| CN201095538Y (en) * | 2007-08-07 | 2008-08-06 | 张辉 | Boring ceramic support roller |
| CN103935692A (en) * | 2014-04-15 | 2014-07-23 | 山东科技大学 | Cylinder device of belt conveyer |
| WO2016089690A1 (en) * | 2014-12-03 | 2016-06-09 | Asgco Manufacturing, Inc. | Trough training idler |
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2017
- 2017-08-02 WO PCT/CL2017/000022 patent/WO2018072044A1/en not_active Ceased
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4502310A (en) * | 1979-07-09 | 1985-03-05 | Gosudarstvenny Proektny I Konstruktorsky Institut Sojuzprommekhanizatsia | Conveyor roller and method of manufacture thereof |
| EP0930252A1 (en) * | 1998-01-15 | 1999-07-21 | MANNESMANN Aktiengesellschaft | Conveyor for articles |
| CN201095538Y (en) * | 2007-08-07 | 2008-08-06 | 张辉 | Boring ceramic support roller |
| CN103935692A (en) * | 2014-04-15 | 2014-07-23 | 山东科技大学 | Cylinder device of belt conveyer |
| WO2016089690A1 (en) * | 2014-12-03 | 2016-06-09 | Asgco Manufacturing, Inc. | Trough training idler |
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| XINGLI, CÁTALOGO, 2016, pages 2, Retrieved from the Internet <URL:http://hzdt.com.cn/Pro_detail.aspx?id=7.> [retrieved on 20171122] * |
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